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7、in the corner, on the corner, at the corner：in the corn 表示在落，in 指角的内面;on the corner 表示“在角上” ，on 指的不是内面，也不是外面，而含内外兼有之意;at the corner指“在拐角处” 指的是拐角外旁边的外面。
如：The lamp stands in the corner of the room./ I met at with him at the street corner./ He sat on the corner of the table.
8、in the end, at the end of, by the end of：in the end 作“最终”“最终”解，可单独运用，后不接介词 of;at the end of 表示“在……末梢”“到……终点” ，既可指时间，也可以指地上或物体。不行单独运用;by the end of 作“在……结束时”“到……末为止”解，只能指时间，不行单独运用。
如：In the end they reached a place of safety./ At the end of the road stands a beautiful garden./ They decided to have an English evening at the end of this week./ by the
end of last month he had finished the novel
9、表示“关于”的 about 和 on：两者都有“关于”的意思，不过前者为一般用词，而后者表示“关于” ，为较正式的 “论述”
如：He came to tell me about something important./ He wrote a book on science
10、between, among：一般说来，between 表示两者之间，among用于三者或三者以上的中间。

如：You are to sit between your father and me./ He is always happy among his classmates.
留意：但有时说的虽然是三个以上的人或东西，假如强调的是两两相互间接关系，适用于between。
如：Agreements were made between the different countries. 在谈到一些事物或一组事物，
而把它们视为分居两边时用 between。
如：The little valley lies between high mountains.
在谈事物间的差别时，总是用 between。
如：They don’t know the difference between wheat, coats and barley.
11、besides, except, but, except for：
besides 指除了……还有
如：All went out besides me
except 指“除了，减去什么” ，不能放在句首。
如：All went out except me.
but 与 except 意思近似，表示“除了……外”常常用在 no, all, nobody, anywhere, everything 等和其他疑问词后面。
如：I never saw him reading anything but the newspaper.;
except